<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ name: 'home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示框 -->
      <el-alert title="注意:只允许为第三级分类设置相关参数" type="warning" show-icon :closable="false"></el-alert>
      <!-- 选择商品分类 -->
      <el-row class="cat_select">
        <el-col>
          <span>请选择商品分类：</span>
          <el-cascader v-model="selectedKeys" :options="cateList" :props="cascaderProps" @change="handleChange" clearable></el-cascader>
        </el-col>
      </el-row>
      <!-- 标签页 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="btnDisabled" @click="addDialogVisible = true">添加参数</el-button>
          <el-table :data="paramsData" border>
            <el-table-column label="明细" type="expand">
              <template slot-scope="scope">
                <div style="padding: 0px 48px">
                  <!-- 循环tag组件，参数明细 -->
                  <el-tag :key="i" v-for="(item, i) in scope.row.attr_vals" closable @close="handleClose(scope.row, i)">
                    {{ item }}
                  </el-tag>
                  <!-- 输入文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                </div>
              </template>
            </el-table-column>
            <el-table-column label="序号" type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="btnDisabled" @click="addDialogVisible = true">添加属性</el-button>
          <el-table :data="paramsData" border>
            <el-table-column label="明细" type="expand">
              <template slot-scope="scope">
                <div style="padding: 0px 48px">
                  <!-- 循环tag组件，参数明细 -->
                  <el-tag :key="i" v-for="(item, i) in scope.row.attr_vals" closable @close="handleClose(scope.row, i)">
                    {{ item }}
                  </el-tag>
                  <!-- 输入文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                </div>
              </template>
            </el-table-column>
            <el-table-column label="序号" type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog :title="'添加' + title" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="title" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog :title="'修改' + title" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="title" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //分类列表
      cateList: [],
      //   级联选择器配置
      cascaderProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      //级联选择器选中的id数组
      selectedKeys: [],
      //当前激活的标签页
      activeName: "many",
      //参数数据
      paramsData: [],
      addDialogVisible: false,
      addForm: {},
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
          { min: 2, max: 10, message: "长度在2到10个字符", trigger: "blur" },
        ],
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
          { min: 2, max: 10, message: "长度在2到10个字符", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status != 200) {
        return this.$message.error("获取商品分类失败");
      }
      this.cateList = res.data;
    },
    //监听级联选择器的改变事件
    handleChange() {
      this.getParamsData();
    },
    // 监听标签页的点击事件
    handleClick() {
      this.getParamsData();
    },
    // 获取分类参数数据
    async getParamsData() {
      // 判断是否选择三级分类
      if (this.selectedKeys.length != 3) {
        this.selectedKeys = [];
        this.paramsData = [];
        return;
      }
      // 根据所选分类获取动态参数或静态属性
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes`, { params: { sel: this.activeName } });
      if (res.meta.status != 200) {
        return this.$message.error("获取参数失败");
      }
      // 对参数明细进行处理
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(",") : [];
        item.inputVisible = false; //控制文本框的显示与隐藏
        item.inputValue = ""; //文本框中输入值
      });
      this.paramsData = res.data;
    },
    //监听添加对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //确定添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.post(`categories/${this.catId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
        });
        if (res.meta.status != 201) {
          return this.$message.error("添加参数失败");
        }
        this.addDialogVisible = false;
        this.getParamsData();
        this.$message.success("添加参数成功");
      });
    },
    //删除参数
    removeParams(id) {
      this.$confirm("确定要删除该参数嘛?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(`categories/${this.catId}/attributes/${id}`);
          if (res.meta.status != 200) {
            return this.$message.error("删除参数失败");
          }
          this.getParamsData();
          this.$message.success("删除参数成功");
        })
        .catch(() => {
          this.$message.info("删除参数失败");
        });
    },
    //编辑参数
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes/${id}`, {
        params: { attr_sel: this.activeName },
      });
      if (res.meta.status != 200) {
        return this.$message.error("查询参数失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //修改参数对话框关闭
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //修改参数确定
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${this.editForm.attr_id}`, {
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName,
          attr_vals: this.editForm.attr_vals,
        });
        if (res.meta.status != 200) {
          return this.$message.error("修改参数失败");
        }
        this.editDialogVisible = false;
        this.getParamsData();
        this.$message.success("修改参数名称成功");
      });
    },
    // 监听tag关闭
    handleClose(row, i) {
      row.attr_vals.splice(i, 1);
      this.updateParamsDetail(row);
    },
    //显示输入框
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    //文本框提交
    handleInputConfirm(row) {
      if (row.inputValue.trim()) {
        row.attr_vals.push(row.inputValue.trim());
        this.updateParamsDetail(row);
      }
      row.inputVisible = false;
      row.inputValue = "";
    },
    // 更新参数明细
    async updateParamsDetail(row) {
      const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(","),
      });
      if (res.meta.status != 200) {
        return this.$message.error("更新参数明细失败");
      }
      this.$message.success("更新参数明细成功");
    },
  },
  computed: {
    //当前选中的三级分类Id
    catId() {
      return this.selectedKeys.length == 3 ? this.selectedKeys[2] : null;
    },
    // 控制按钮启用和禁用
    btnDisabled() {
      return this.selectedKeys.length == 3 ? false : true;
    },
    //添加对话框标题
    title() {
      return this.activeName == "many" ? "动态参数" : "静态属性";
    },
  },
};
</script>

<style lang="less" scoped>
.cat_select {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>
